Synthesis and biological response of size-specific, monodisperse drug-silica nanoconjugates.

Synthesis and biological response of size-specific, monodisperse drug-silica nanoconjugates.
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DOI:
10.1021/nn300149c
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发表时间:
2012-05-22
期刊:
影响因子:
17.1
通讯作者:
Cheng, Jianjun
Cheng, Jianjun
中科院分区:
材料科学1区
文献类型:
--
作者:
Tang, Li;Fan, Timothy M.;Borst, Luke B.;Cheng, Jianjun

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Drug-containing nanoparticles (NPs) with monodisperse, controlled particle sizes are highly desirable for drug delivery. Accumulating evidence suggests that NPs with sizes less than 50 nm demonstrate superior performance in vitro and in vivo. However, it is difficult to fabricate monodisperse, drug-containing NPs with discrete and incremental difference in sizes required for studying and characterizing existing relationships among particle size, biologic processing, and therapeutic functionality. Here, we report a scalable process of fabricating drug-silica conjugated nanoparticles, termed drug-silica nanoconjugates (drug-NCs), which possess monodisperse size distributions and desirable particle sizes as small as 20 nm. We found that 20-nm NCs are superior to their 50-nm and 200-nm NC analogues by 2–5 and 10–20 folds, respectively, with regard to tumor accumulation and penetration, and cellular internalization. These fundamental findings underscore the importance and necessity of further miniaturizing nanomedicine size for optimized drug delivery applications.
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